Hotop Feeler Gauge 32 Blade Set Is Our Top Pick
Fixing the gap in the spark plug might be simple, but if you don’t have the right tool, you can do more harm than good. When you come across different engine issues, you can pull your spark plug out, and by looking at it, you can tell the state of tune your motor is in.
And, if the spark plug itself is faulty, you might need to fix it with the gap tool. So, while fixing the device, you cannot randomly pick any tool for your precious vehicle.
Here, we have listed the best spark plug gap tool you can rely on. So, let’s move on to the article and choose what suits you the best.
Our top 3 picks:
  | Editor’s Choice Hotop 32 Blades Steel Feeler Gauge Imperial Measuring Tool | |
  | Best Spark Plug Gap for User Convenience CTA Tools Spark Plug Gapper | |
  | For Robust Material OEMTOOLS 26 Blade Master Feeler Gauge |
What is Spark Plug Gap?
Before getting into the spark plug gap, we will start with its parts first. Let’s place the device horizontally and follow from the bottom part to the top one. There is a terminal nut at the bottom, and you will find the corrugation on the ceramic in the next part. The insulator component is located on top of the ceramic section.
The hexagonal piece in the next segment holds the socket while inserting and removing the spark plug. As you move up, you’ll notice the gasket, the threaded piece, the insulator, and the electrodes.
Here, the gap between the center and ground electrodes is known as the spark plug gap. This device is a part of the ignition system. It’s basically two electrodes that transfer the voltage.
The voltage is sent down, which jumps back to create a spark in the system through the electrodes. This spark will ignite the air-fuel mixture inside the combustion chamber. It makes a big explosion and starts the power stroke of the engine.
Why Should You Know About Spark Plug Gap Tool?
The simplest answer is that you need to know about the spark plug gap tool to make an appropriate gap in the device. Gapping the spark plug is essential for your engine to achieve proper combustion.
What will happen if the gap is not accurate? For example, a faulty spark plug gap can lead to a faulty engine. And before ruining the engine, it will give you signs such as sudden power loss, plug fouling, poor mileage, and misfiring.
So, to measure the gap, you must first get introduced to the gap tools. There are three types of spark plug gap tools that you can find while shopping around. They are the ramp style gauge, the wire-loop style gauge, and the feeler gauge.
The ramp style gauge is the cheapest and is commonly known as the coin style gap tool. Unfortunately, this one is the most delicate one for the electrodes. If you don’t use it carefully and learn how to use it, you might break the electrodes.
The wire style is also cheap and relatively simple to use. Finally, the most advanced and comparatively expensive one is the feeler gauge. All three of them can serve the purpose well, and they are easy to operate with.
Best Spark Plug Gap Tools – Our Top 10 Picks & Review
Here are our top 10 spark plug gap tool picks that you can choose for better spark performance. However, this entire ranking is based on the overall quality and appealing features of each of the following plug-gap tools that have been evaluated during our test.
1. Editor’s Choice: Hotop 32 Blades Steel Feeler Gauge Imperial Measuring Tool
Brand: Hotop | Weight: 4.4 ounces | Dimensions: 5.98 x 4.29 x 0.24 inches | Material: Stainless steel, Alloy steel
Bright Side
- Rust and corrosion resistant
- Strong built
- Easy storage
- Pretty lightweight
Not So Good Side
- Pretty bulky in size
- Lock nut may require often tightening
This is by far the most reliable and trustworthy spark plug gapper there is, according to professionals. Hence, being awarded the Editor’s Choice. It is a mighty little measuring tool that gets massive jobs done along with optimum safety.
Material Standard
Made of stainless steel and alloy steel combined, this is a favorite among users due to its robust and well-built structure. It has been known as the best of its kind due to its versatility and durability, even for heavy-duty purposes. Each of these gauges has 32 blade in thickness which is easy and convenient to store without causing any deformity.
User Applications
The simplicity and user-friendly nature of these blades are what make them stand out from the rest. It has both imperial and metric units engraved on either side, making it easier to measure mostly all kinds of spark plug gaps (even of motorbikes).
Measurement Accuracy
The accuracy of these blades is impeccable and easy to notice. It has a wide range from 0.0015 to 0.035 sizes in inches, ensuring utmost precision during measurement. Moreover, the detailed and wide range of calibers allows the user to identify even minor changes in the spark gaps.
User Convenience
Even if you are a beginner, you won’t face any challenges while operating this spark plug gap too. The dual mark engravings are easily identifiable and visible, ensuring smooth measurements whatsoever.
Overall Durability
As mentioned, the high-quality stainless and alloy steel make this measuring tool an astounding pick. You can use it for several years with minimum care without any signs of rust or scratches.
2. Best Spark Plug Gap for User Convenience: CTA Tools Spark Plug Gapper
Brand: CTA | Weight: 0.8 ounces | Dimensions: 1 x 1 x1 inch | Material: Metal
Bright Side
- Circular and lightweight in shape
- Larger font than other circular gappers
- Clear indentations of the numbers
- Easy clean-up
Not So Good Side
- Might get lost due to the small size
- Requires to be wiped dry to prevent fading of the numbers
CTA has consistently been at the top of its game with spark plug gappers. These tiny measuring tools are very easy to carry and are super lightweight, ensuring you conduct your measurements with comfort.
Material Standard
CTA is known to use high-quality materials in its products, and this spark plug gapper is no different. The metal used in making this gapper is made of the best quality metal, which experts and professional users have approved.
User Applications
This spark plug gapper comes with easily identifiable units on either side, making it versatile for many measurements. Therefore, you can easily use this spark plug tool to measure the spark plug gap of various high-energy vehicles and motors.
Measurement Accuracy
CTA has ensured this gapper’s accuracy with top-notch precision. It has a range from 0.020 to 0.100 inches of accurate measurement, allowing you to make the best measurements with fewer errors.
User Convenience
The simplicity and straightforward usability of this spark plug gapper are highly appreciated by its users of it. This gapper’s usability does not require prior experience or knowledge. Therefore, you can easily operate this tool without much of a challenge. However, if you still face any confusion, you can always read the user manual for a better understanding.
Overall Durability
Being made of such superior quality metal, the durability of this gapper is exceptional. Although it might not be the absolute best like our top pick, it is highly competitive and superior in quality. Even when used in filthy conditions, you won’t see rust, corrosion, or fading of the indentations.
3. Best Spark Plug Gap for Robust Material: OEMTOOLS 26 Blade Master Feeler Gauge
Brand: OEMTOOLS | Weight: 0.19 pounds | Dimensions: 1 x 1 x 1 inches | Material: Blend
Bright Side
- Easy clean-up
- Offers both imperial and metric units
- Has thumb notch for blades to slide
- Symmetrical and compact size
Not So Good Side
- Unclear font due to glossy finish
- Leaves fingerprints
This blade master feeler gauge has been very popular due to its simplicity and user-friendliness, along with robust tempered steel material. Therefore, operating this measuring tool is indeed going to be pretty fun for users.
Material Standard
Tempered steel is considered one of the toughest materials that can easily withstand wear and tear, allowing you to take your spark plug measurements without any worries of dents. The overall rigid characteristics make this feeler gauge an astounding measuring tool.
User Applications
This spark plug gap tool allows users to make their measurements without trouble. The tool is compatible for measuring mostly all kinds of spark plug gaps, making it an ideal choice for everyone.
Measurement Accuracy
The measurement accuracy of this tool is remarkable since it can evitably measure 0.0015 inches to 0.025 inches, ensuring to give you even the slightest spark plug gap measurement.
User Convenience
This spark plug tool is pretty convenient to operate; even if you are a beginner, you won’t have to face issues while operating it. The 26 blades altogether may appear confusing (only for those who have used one before), but as you go through the manual, you’ll figure out the ins and outs.
Overall Durability
While talking about durability, this feeler gauge may not be as durable as our top product. However, there’s no need for underestimation as this product can surely withstand enough stress and deliver for several years (if maintained well).
4. Spurtar 32 Blades Steel Feeler Gauge Measurement Tool
Brand: Sport | Weight: 2.82 ounces | Dimensions: 4.57 x 1.14 x 0.83 inches | Material: Steel
Bright Side
- Larger and more visible fonts
- Textured finish prevents it from slipping off
- Wide range of measurements is available
- Versatile and useful for several items, including bikes
Not So Good Side
- Requires to be cleaned thoroughly
- Should not be exposed to water
Among all the other 32-blade steel feeler gauge tools, this is known for its amazing compatibility. So, workers can easily put it in their pockets and carry it wherever they like.
Material Standard
The material is made of steel, so there’s no doubt it will be pretty robust. Moreover, the overall polished and glazy look provides a more textured finish. Although, one of the setbacks that may question the material standard is that it’s not made of stainless steel. Therefore, there may always be chances of rust.
User Applications
The feeler gauge is applicable mostly to all types of spark plug gaps. However, it’s highly recommended that you use this feeler gauge for the spark plugs of motorized bikes and private vehicles.
Measurement Accuracy
Spurtar feeler gauge is considerably accurate, with measurements ranging from 0.001inch to 0.04inch. Although our top pick is much more accurate than this one, you can still get good measurement accuracy.
User Convenience
Undoubtedly, it’s one of the most convenient spark plug tools to operate. Even with 32-scale blades, you won’t face much of a challenge in operating this astounding feeler gauge. Moreover, it’s foldable as well.
Overall Durability
Since it’s made of polished steel, there’s no question about how robust the material is. However, as there’s no layer coating on the blades, there are always chances of rust.
5. ZUZUAN 1 Pack Feeler Gauge
Brand: Zuzuan | Weight: 6.38 ounces | Dimensions: 5.5 x 2.5 x 0.5 inches | Material: 65 manganese steel
Bright Side
- Comparatively lightweight
- Pretty durable
- It has got detachable
- Clear fonts
Not So Good Side
- Adjustment of lock nut is required
- Needs to be cleaned and dried after each use
Although this might be a little heavier and larger in size and weight compared to others, it comes with the additional advantage of being detachable, which is unique to tools of these kinds. It is one of the most reliable tools to use when working with spark plugs.
Material Standard
65 Manganese steel is one of the most durable and reliable metals there is for tools like these. Therefore, you can easily use this measuring tool for various purposes, including spark plug gaps. That’s not all; even with minimum maintenance and heavy-duty measuring, you won’t find scratches or dents on it.
User Applications
This gapper can be used on almost all types of spark plugs regardless of how old or new it is. It can be used in almost all types of automobiles and serve its purpose completely without any scope for complaints.
Measurement Accuracy
With this spark plug gap tool, you can rest assured that you will get the most accurate results you could expect. It comes in a variety of ranges starting from 0.04mm to 0,88mm with clear and visible indications, which grants you the perfect measurement each time with several variations.
User Convenience
The most impressive factor about this gapper is that it is detachable according to your preference and needs. It is surprising how many benefits and uses you could get out of something so simple and small that it can even fit in your pockets.
Overall Durability
This small measuring tool ensures it last a very long time even through rigorous wear and tears. It does not bend or dent when used for heavy-duty purposes and ensures longevity. Overall, it is a very impressive and mighty tool that is sure to come in very handy and useful at times.
6. CTA Tools 3238 9-Wire Spark Plug Gap Gauge
Brand: CTA Tools | Weight: 1.13 Ounces | Material: Steel | Dimensions: 2.25 x 2.75 x 6 inches
Bright Side
- Heavy-duty design for more extraordinary performance
- Extended lifespan
- Effortless to use
- Higher accuracy
Not So Good Side
- It might be a little thin for some engines
- Slightly expensive
CTA spark plug gaps are most renowned for their heavy-duty construction, which makes them long-lasting. Besides, you’ll end up with professional-grade performance every time you use it.
Material Standard
The CTA tools spark plug gap is made with 100% stainless steel. The ultra-rigid material is the primary reason for this equipment’s ultra-durability. The material built its extreme stability and flexibility, which you’re going to love.
User Applications
The sparkle plug gap we’re talking about is a very versatile tool with a neutral shape. So it can go with a wide range of automobiles. When it comes to your requirements, this spark plug gap can fulfill all of them.
Measurement Accuracy
Measuring the gap on spark plugs with the farthest accuracy is possible with this tool. The scale ranges in a variety of sizes, including 0.025, 0.030, 0.035, 0.040, 0.044, 0.045, .0.050, 0.055, and 0.060 inches. As a result, you get the nearest approximation every time. Thanks to its built-in gap adjuster that helps you get top-notch accuracy out of it.
User Convenience
Compared to other flimsy gap gauges, it always stands out due to the convenience it offers to users. The wires from this equipment are very handy to get in and out.
Overall Durability
As mentioned earlier, this is the most durable spark plug gap gauge you can ever own. It can last over the years and still work like a new one. Since it goes with engines of all vehicles, its leniency for rough usage is pretty assured.
7. Stainless Steel Feeler Gauge
Brand: Handbook | Weight: 4.2 ounces | Material: Stainless Steel | Dimensions: 5 x 2.6 x 0.7 inches
Bright Side
- The dual-marked design makes it easy to identify
- High-quality stainless steel ensures its high durability
- Provides a blade protector
- Simple to use
Not So Good Side
- Not the best for racing engines
- Numbers might fade away after a few usages
We are glad to offer you this tool that provides the most excellent materials. As a result, you get consistent yet efficient service from this mechanism.
Material Standard
The construction of this tool is going to cause ultra-knowing performance. The fact gets ensured with its highest quality stainless steel material. The structure is thick enough to deal with leading vehicle engines.
User Applications
The standard design of this spark plug gap gauge is perfect for professional-grade usage. Even beginners can get the best result out of this equipment.
Measurement Accuracy
The dual-marked metric and imperial parts come in a massive variety of sizes. It has an estimated size for every possible spark plug gap. Metric size would be from 0.02 to 0.85, and inch size would be from 0.0008 to 0.040.
User Convenience
You will be surprised by discovering the reliable support this tool gets you. It is foldable and portable, making it super convenient for all. It has 32 blades, all of which have size lasers for painless identification. The blades are pitting and deteriorating-proof.
Overall Durability
We realize you never want to compromise with durability; that’s why we suggest this tool. Each blade from this has blade protectors that ensure its lifespan. Loss of any of the edges is entirely impossible with its intelligent design.
8. Performance Tool W163C Wide Gap Wire Spark Plug and Gauge Tool
Brand: Performance Tool | Weight: 0.96 ounces | Dimensions: 3 x 1 x 1 inch | Material: Stainless Steel
Bright Side
- Provides a very handy service
- Budget-friendly
- Accurate reading every time
- Provides high-quality service
Not So Good Side
- Numbers are sometimes hard to get
- Sometimes comes with manufacturing problems
We all know how important it is to get the perfect and well-matched spark plug to make it work. This tension goes away when you get this really handy spark plug with the ideal gap and accuracy. You will surely fall in love with this as it serves as an electrode tool as well as ensures perfect spacing.
Material Standard
This spark plug is made of authentic stainless steel, making it the strongest, corrosion resistant, and heat resistant. Products made of stainless steel mostly have a high melting point, which is the first characteristic of an ideal spark plug. Also, this one is made of highly durable and sustainable material, serving you with the best quality.
User Applications
Sparks plugs are used to create continuous sparks in the engine, which is why the plug must be highly durable to cope with the extreme pressure of creating sparks. One of the most valuable things about this spark plug is that it can be used in high-energy and newer engines, exposing its proficiency in this field.
Measurement Accuracy
Unlike any other gap gauge reader, this one nails it with its millimeter converting carved back regarding accuracy. The metric size goes for .635, .762, .889, 1.01, 1.11, 1.37, 1.52, and 2.03mm, leaving you with no space for inaccuracy.
User Convenience
Convenience is what is the most important in spark plugs. This one is convenient, like no spark plug, as you can easily carry it around even in your key chains. It has a 1″ diameter, which makes it fit in any small area. So, you can undoubtedly claim to be the handiest spark plug ever.
Overall Durability
After years of observing and testing, we now stand in a place where we can say that it’s the most durable spark plug that you’ll ever meet. Using stainless steel as its material proves to be the right choice to make it so stable and sustainable. This spark plug has served for years with its unique features like electrode tools and high sustainability.
9. Weewooday Spark Plug Tool
Brand: Weewooday | Weight: 0.317 ounces | Dimensions: 3.15 x 3.11 x 0.71 inches | Material: Zinc Alloy
Bright Side
- Requires no extra tool; very versatile
- Easy storage and portable
- Nattily designed
- Top-notch accuracy
Not So Good Side
- Average blending with electrode
- A little shiny to read in the sunlight
We want you to own something that eliminates unnecessary hassle instead of increasing them. Weewooday turns out to be the perfect pick for that. It meets all your requirements since it’s made with heavy-duty materials and designed exceptionally with unique and reliable features.
Material Standard
Our measuring tool is made of high-quality zinc alloy. That means you are getting the most rigid construction. Precise engraving comes along in this case. Zinc alloy makes the tool ideal for measuring precisely. Moreover, you end up with decreased gap decline, fewer misfires, and promising execution.
User Applications
Along with experts, beginners will find this space gauge very beneficial. It can be used with newer as well as older engines. You will find it works like a pro in high-energy machines too. And we all know how demanding that feature is nowadays.
Measurement Accuracy
Now let’s talk about the main deal. Although us obsessing over this tool and have said all about its accuracy already, we want to explain the fact in numbers. The space gauge, with its easy-to-use and read scale, measures accurately from 0.020 to 0.100 inches. The metric scale shows from 0.6 to 2.4 mm.
User Convenience
On the space gauge, you’ll find a small hole. With that, you can hang the tool with your keychain, which simply means easy carrying. The small gap tools are approximately 1.5 inches in diameter. So storing them is not going to be a hassle either. The readings are clear and easy to read; it’s a time saver in an emergency.
Overall Durability
The high-quality, heavy-duty, rigid material of this tool makes this super durable. The gauge will legitimately last over the years. It is made in a way that all potential dangers lose against it. So, fewer risks mean a longer lifespan. It is the sturdiest space gap tool ever.
10. SATA 32-Piece Feeler Gauge Set ST09407SJ
Brand: SATA | Weight: 5.6 ounces | Dimensions: 0.5 x 0.75 x 3.75 inches | Material: Stainless Steel
Bright Side
- Long-lasting
- Ultra-knowingly designed
- Great quality materials
- Pocket-friendly
Not So Good Side
- It needs to be thoroughly cleaned after use
- Should’ve been easier to read
Whether a newer or an older engine, you must get a reliable space gauge for an accurate reading. The importance of the following tool is unavoidable. So we would like to suggest you this SATA feeler gauge set that is capable of offering you top-notch professional-grade results.
Material Standard
Preventing erosion, corrosion, and heat gets more accessible and more effective with the high-quality steel of this tool. We can’t get over its extraordinary performance. So it’s evident that the better the materials and construction, the higher the performance.
User Applications
Mechanics from all over the world adore this tool. You get everything you need with this gauge. It is multifunctional equipment that can save your pocket by taking care of the whole deal.
Measurement Accuracy
Estimation accuracy can’t be overlooked. Get this space gauge that can help you get an accurate reading. It comes in an enormous range of sizes. Its diameter measurement starts from 0.0008 mm and ends at 1.00 mm.
User Convenience
We believe there are a few gauges that can benefit you in the way this tool gets you convenience. With perfect blade length and multi-functionality, the appliance makes the job easier.
Overall Durability
For durability, this gauge is the best pick. By reducing all threats, it can last longer. Its rigid construction makes it suitable for extreme situations usage.
FAQ
Answer: A small gap will cause weak ignition. Sometimes the spark can be too weak to even start the engine, which will eventually lead to numerous engine issues.
Answer: A bigger gap will make it difficult to transfer voltage through the electrodes. And when the gap is too big, it needs more voltage to function. That leads to a weaker spark and ignition. As a result, the performance of your vehicle will fall noticeably.
Answer: Not every spark plug requires manual gapping. Modern and advanced versions of spark plugs come pre-gapped and don’t need any gapping tools. So, check the spark plug model and then decide if it requires a gap tool or not.
Answer: The ideal gap that you can create on the spark plug is between 0.5 mm and 1mm. And this gap will vary depending on the type of fuel, ignition, cylinder head, and any factor related to the engine. That’s why to do a proper inspection before determining the best gap for your spark plug.
The Wrap–Up!
When it comes to automotive parts, it gets more difficult to make up your mind about a product. But when you know what to look for, it gets easier to choose. In our opinion, the Hotop Feeler Gauge 32 Blade Set is the best one that can serve you in the long term without damaging your spark plug.
If you are a complete amateur, then we suggest that you talk to the manufacturer or a professional mechanic for a better understanding of this tool.